A digital multi-way valve test bench and a digital multi-way valve performance verification method

Abstract

The present application provides a digital multi-way valve test bench and a digital multi-way valve performance verification method. The digital multi-way valve test bench provided by the present application includes a drive module and a verification module; the drive module includes a DC speed control motor; the digital multi-way valve to be tested is installed on the verification module, and multiple sensors are installed on the digital multi-way valve to be tested; the verification module includes a pressure switching circuit, a loading bridge circuit and a back pressure loading circuit, multiple oil inlets of the digital multi-way valve to be tested are connected to multiple series connection points of the pressure switching circuit, the first parallel connection point and the second parallel connection point of the loading bridge circuit are connected to the first oil inlet and the second oil inlet of the digital multi-way valve to be tested, and the back pressure loading circuit is connected to the oil inlet of the digital multi-way valve to be tested. The digital multi-way valve test bench and the digital multi-way valve performance verification method provided by the present application are used to integrate the circuits of various performance tests into one circuit, and the key control performance of the digital multi-way valve can be verified without switching the pipeline interface.

Description

Technical Field

[0001] The present application relates to the field of hydraulic technology, and in particular to a digital multi-way valve test bench and a digital multi-way valve performance verification method. Background Art

[0002] Digital multi-way valves play a key role in modern hydraulic systems, and their performance directly affects the efficiency and stability of the entire system. Through the digital multi-way valve test bench, various working conditions and abnormal working conditions can be simulated to conduct pressure resistance, vibration, impact and other tests on the digital multi-way valve to ensure its safety and reliability in practical applications. In addition, the digital multi-way valve test bench can also help detect and analyze the wear and aging of digital multi-way valves in long-term operation, providing important data for product improvement and life prediction. Therefore, the digital multi-way valve test bench can improve the quality of digital multi-way valves and ensure the normal operation of hydraulic systems.

[0003] At present, the performance verification of digital multi-way valves is mainly based on traditional digital multi-way valve test benches. However, it cannot verify the key control performance of digital multi-way valves. In addition, the traditional digital multi-way valve test bench divides the circuits of each performance test into multiple circuits. When performing different performance tests, it is necessary to switch the pipeline interface, which is not conducive to operation. Therefore, there is an urgent need for a digital multi-way valve test bench that integrates the circuits of each performance test into one circuit, and can verify the key control performance of the digital multi-way valve without switching the pipeline interface. Summary of the invention

[0004] In view of this, the present application provides a digital multi-way valve test bench and a digital multi-way valve performance verification method, which are used to integrate the circuits of various performance tests into one circuit, and the key control performance of the digital multi-way valve can be verified without switching the pipeline interface.

[0005] Specifically, the present application is implemented through the following technical solutions:

[0006] The first aspect of the present application provides a digital multi-way valve test bench, characterized in that the digital multi-way valve test bench includes a drive module and a verification module; wherein the drive module includes a DC speed regulating motor, which is used to provide high-pressure oil to the verification module when the performance of the digital multi-way valve under test is verified; the digital multi-way valve under test is installed on the verification module, and an oil inlet is provided on the digital multi-way valve under test, and the oil inlet is connected to the verification module, and a plurality of sensors are installed on the digital multi-way valve under test, and the type of the sensor is determined according to the type of the digital multi-way valve under test and the performance to be verified, and the sensor is used to collect the performance parameters of the digital multi-way valve under test during the loading process, wherein the performance parameters are used to perform performance verification on the digital multi-way valve under test;

[0007] The oil inlet of the digital multi-way valve under test is connected to a verification module, which includes a pressure switching circuit, a loading bridge circuit and a back-pressure loading circuit. The multiple oil inlets are connected to a first series connection point, a second series connection point and a third series connection point of the pressure switching circuit. The first parallel connection point of the loading bridge circuit is connected to the first oil inlet of the digital multi-way valve under test, the second parallel connection point of the loading bridge circuit is connected to the second oil inlet of the digital multi-way valve under test, and the back-pressure loading circuit is connected to the oil inlet of the digital multi-way valve under test. The verification module is used to determine the oil inlet of the digital multi-way valve under test based on the performance to be verified of the digital multi-way valve under test, control the high-pressure oil to flow to the oil inlet, apply a load to the digital multi-way valve under test, and control the loading of the digital multi-way valve under test.

[0008] The second aspect of the present application provides a digital multi-way valve performance verification method, which is applied to the digital multi-way valve test bench provided in the first aspect of the present application; the method comprises:

[0009] Determine the oil inlet of the digital multi-way valve under test based on the to-be-verified performance of the digital multi-way valve under test, and control the high-pressure oil to flow to the oil inlet;

[0010] Applying a load to the oil inlet of the digital multi-way valve under test based on the flow direction of the high-pressure oil, and controlling the loading of the digital multi-way valve under test;

[0011] The performance parameters of the digital multi-way valve under test during the loading process are collected based on sensors, and the performance of the digital multi-way valve under test is verified based on the performance parameters.

[0012] The digital multi-way valve test bench and digital multi-way valve performance verification method provided by the present application, on the one hand, use a DC speed regulating motor as a driving device, which can realize speed closed-loop control, improve the accuracy of the high-pressure oil output by the tested motor, and can test the optimal speed range of the tested motor, thereby improving the accuracy and reliability of the control performance verification of the tested motor. On the other hand, by setting the digital multi-way valve test bench as a driving module and a verification module, the tested digital multi-way valve is installed on the verification module, and the driving module provides high-pressure oil to the verification module. The verification module applies a load to the tested digital multi-way valve based on the performance to be verified of the tested digital multi-way valve to control the loading of the tested digital multi-way valve, and the working load of the tested digital multi-way valve can be accurately adjusted, thereby controlling the output pressure and flow of the tested digital multi-way valve, avoiding idling or overspeeding of the tested digital multi-way valve, and improving stability. Furthermore, based on the sensors installed on the digital multi-way valve under test, the performance parameters of the digital multi-way valve under test during the loading process are collected in real time. Subsequently, the performance of the digital multi-way valve under test can be verified based on the performance parameters corresponding to the performance to be verified and the performance verification method, thereby realizing the verification of the key control performance of the digital multi-way valve and realizing new functions such as multi-source state detection and life prediction of the digital multi-way valve, thereby providing test conditions for factory testing and research and development of new digital multi-way valves. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A structural schematic diagram of a first embodiment of a digital multi-way valve test bench provided in this application;

[0014] Figure 2 This is a schematic diagram of the structure of a driving module shown in an exemplary embodiment of the present application;

[0015] Figure 3 This is a schematic diagram of the structure of a verification module shown in an exemplary embodiment of the present application;

[0016] Figure 4 A flow chart of a first embodiment of a digital multi-way valve performance verification method provided in this application;

[0017] Description of reference numerals:

[0018] 1.5: DC speed regulating motor

[0019] 2: Proportional piston pump

[0020] 3: Relief valve

[0021] 4.1, 4.2: Proportional relief valve

[0022] 6: High pressure plunger pump

[0023] 7.1, 7.2, 7.3, 7.4: Pressure sensors

[0024] 8.1, 8.2: Flow meter

[0025] 9.1, 9.2: High pressure filter

[0026] 10: High pressure ball valve

[0027] 11.1, 11.2: Oil return filter

[0028] 12.1, 12.2, 12.3, 12.4, 12.5, 12.6, 12.7, 12.8, 12.9, 12.10: Solenoid stop valve

[0029] 13.1, 13.2, 13.3, 13.4: Check valve

[0030] 14: Solenoid overflow valve

[0031] 15.1, 15.2, 15.3, 15.4, 15.5, 15.6, 15.7, 15.8, 15.9, 15.10, 15.11, 15.12, 15.13, 15.14, 15.15, 15.6: Quick-change connector

[0032] 16: Digital multi-way valve under test DETAILED DESCRIPTION

[0033] Here, exemplary embodiments will be described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application.

[0034] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used in this article refers to and includes any or all possible combinations of one or more associated listed items.

[0035] It should be understood that although the terms first, second, third, etc. may be used in the present application to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0036] Specific embodiments are given below to introduce the technical solution of the present application in detail.

[0037] Figure 1 This is a structural diagram of the first embodiment of the digital multi-way valve test bench provided in this application. Figure 1 , the digital multi-way valve test bench provided in this embodiment, the digital multi-way valve test bench includes a driving module and a verification module; wherein the driving module includes a DC speed regulating motor, which is used to provide high-pressure oil to the verification module when the performance of the digital multi-way valve under test is verified; the digital multi-way valve under test is installed on the verification module, and an oil inlet is provided on the digital multi-way valve under test, and the oil inlet is connected to the verification module, and a plurality of sensors are installed on the digital multi-way valve under test, and the type of the sensor is determined according to the type of the digital multi-way valve under test and the performance to be verified, and the sensor is used to collect the performance parameters of the digital multi-way valve under test during the loading process, wherein the performance parameters are used to perform performance verification on the digital multi-way valve under test;

[0038] The oil inlet of the digital multi-way valve under test is connected to a verification module, which includes a pressure switching circuit, a loading bridge circuit and a back-pressure loading circuit. The multiple oil inlets are connected to a first series connection point, a second series connection point and a third series connection point of the pressure switching circuit. The first parallel connection point of the loading bridge circuit is connected to the first oil inlet of the digital multi-way valve under test, the second parallel connection point of the loading bridge circuit is connected to the second oil inlet of the digital multi-way valve under test, and the back-pressure loading circuit is connected to the oil inlet of the digital multi-way valve under test. The verification module is used to determine the oil inlet of the digital multi-way valve under test based on the performance to be verified of the digital multi-way valve under test, control the high-pressure oil to flow to the oil inlet, apply a load to the digital multi-way valve under test, and control the loading of the digital multi-way valve under test.

[0039] For details, please refer to Figure 1 The digital multi-way valve test bench includes a drive module and a verification module. The drive module includes a DC speed regulating motor. The digital multi-way valve under test is installed on the verification module through a quick-change connector. A plurality of sensors are installed on the digital multi-way valve under test. The digital multi-way valve under test is provided with an oil inlet. The oil inlet of the digital multi-way valve under test is connected to the verification module. The drive module and the verification module are connected through P1.

[0040] It should be noted that there are multiple types of sensors installed on the digital multi-way valve under test. These multiple types of sensors are installed on the digital multi-way valve under test at the same time to monitor the performance parameters of the digital multi-way valve under test during the loading process in real time. When determining the performance to be verified of the digital multi-way valve under test, it is only necessary to read the corresponding sensor based on the performance parameters required for the performance to be verified (for example, when the performance to be verified is pressure resistance and pressure stability, the performance parameters collected by the pressure sensor are usually read; when the performance to be verified is flow characteristics, flow accuracy, and response time, the flow sensor is usually read to collect relevant performance parameters; when the performance to be verified is position accuracy and response speed, the performance parameters collected by the displacement sensor are usually read), without reading all sensors.

[0041] Furthermore, the driving module is used to provide high-pressure oil to the verification module when verifying the performance of the digital multi-way valve under test. The verification module is used to determine the oil inlet of the digital multi-way valve under test based on the performance to be verified of the digital multi-way valve under test, control the high-pressure oil provided by the driving module to flow to the oil inlet, apply a load to the oil inlet of the digital multi-way valve under test, and control the loading of the digital multi-way valve under test.

[0042] In specific implementation, when it is necessary to verify the performance to be verified of the digital multi-way valve under test, the driving module generates high-pressure oil through driving action, and transmits the generated high-pressure oil to the verification module as needed. The verification module receives the high-pressure oil transmitted by the driving module, determines the oil inlet of the digital multi-way valve under test based on the performance to be verified of the digital multi-way valve under test (it should be noted that the oil inlet of the digital multi-way valve under test is different for different performances to be verified), controls the high-pressure oil to flow to the oil inlet, applies a load to the oil inlet of the digital multi-way valve under test, and controls the loading of the digital multi-way valve under test. During the loading process of the digital multi-way valve under test, the sensor collects the performance parameters of the digital multi-way valve under test in real time, and performs performance verification on the digital multi-way valve under test based on the performance verification method corresponding to the performance to be verified of the digital multi-way valve under test and the collected performance parameters.

[0043] The specific structure of each module of the digital multi-way valve test bench is introduced below.

[0044] Figure 2 This is a schematic diagram of the structure of a driving module shown in an exemplary embodiment of the present application. Figure 2 The driving module includes a power unit and an oil replenishing unit; wherein the power unit is connected to the verification module, and the oil replenishing unit is connected to the verification module.

[0045] Furthermore, the power unit is used to provide high-pressure oil to the verification module when verifying the performance of the digital multi-way valve under test; the oil replenishment unit is used to provide low-pressure oil to the verification module when the pressure in the oil port of the digital multi-way valve under test is lower than a preset threshold. The preset threshold is set according to actual needs and is not limited in this embodiment.

[0046] For details, please continue to refer to Figure 2 The power unit includes a DC speed regulating motor 5, a high-pressure plunger pump 6, a proportional relief valve 4.1, a pressure sensor 7.1, a high-pressure filter 9.2, and a high-pressure ball valve 10. The DC speed regulating motor 5 is directly connected to the high-pressure plunger pump 6 through a coupling, the output end of the high-pressure plunger pump 6 is connected to the proportional relief valve 4.1, the high-pressure filter 9.2, and the high-pressure ball valve 10 in sequence, and the pressure sensor 7.1 is connected to the output pipeline of the high-pressure plunger pump 6.

[0047] Furthermore, the DC speed regulating motor 5 is used to drive the high-pressure plunger pump 6. The DC speed regulating motor 5 performs closed-loop speed regulation according to its own speed and the set speed, and adjusts its own speed to the target value based on the received feedback signal to control the operating speed and oil volume of the high-pressure plunger pump 6. The high-pressure plunger pump 6 is used to provide stable high-pressure oil according to the driving speed of the DC speed regulating motor 5. The proportional relief valve 4.1 is used to adjust and control the output pressure of the high-pressure plunger pump 6, and can simulate abnormal working conditions such as pressure shock and system vibration, so as to provide a test circuit for realizing the multi-source state monitoring and life prediction functions of the digital multi-way valve under test. The pressure sensor 7.1 is used to monitor the outlet pressure of the high-pressure oil output by the high-pressure plunger pump 6, and adjust the outlet pressure of the high-pressure oil based on the relationship between the outlet pressure of the high-pressure oil and the target pressure. The filtration accuracy of the high-pressure filter 9.2 is 5 microns, which is used to filter impurities in the high-pressure oil output by the high-pressure plunger pump 6 to ensure the cleanliness of the high-pressure oil entering the verification module. The high-pressure ball valve 10 is used to control the flow direction and flow rate of the high-pressure oil, and can selectively open or close the flow path.

[0048] In specific implementation, the DC speed regulating motor 5 starts and drives the high-pressure plunger pump 6 to operate. The speed of the DC speed regulating motor 5 can be adjusted to control the flow output of the high-pressure plunger pump 6. The high-pressure plunger pump 6 sucks hydraulic oil from the hydraulic oil tank, pressurizes it, and outputs high-pressure oil. The high-pressure oil passes through the proportional relief valve 4.1, and the proportional relief valve 4.1 adjusts the flow of high-pressure oil according to the set pressure value, releases excess pressure, and prevents the system from over-pressure. Further, the high-pressure oil passes through the high-pressure filter 9.2, and the high-pressure filter 9.2 removes impurities in the high-pressure oil to ensure the cleanliness of the high-pressure oil. Further, the high-pressure oil passes through the high-pressure ball valve 10 by opening or closing the hydraulic oil circuit to adjust the flow direction of the high-pressure oil. The pressure sensor 7.1 monitors the pressure of the output high-pressure oil in real time, and feeds the data back to the control system for precise pressure control and regulation.

[0049] The digital multi-way valve test bench provided in this embodiment, on the one hand, uses a DC speed regulating motor as a driving device, which can realize closed-loop speed control, improve the accuracy of the high-pressure plunger pump outputting high-pressure oil, and can test the optimal speed range of the high-pressure plunger pump, thereby improving the accuracy and reliability of the verification of the control performance of the tested digital multi-way valve. On the second hand, by designing a pressure sensor to monitor the pressure of the high-pressure oil output by the high-pressure plunger pump in real time, and designing a proportional relief valve to adjust the high-pressure oil flow rate according to the set pressure value, it can ensure that the system pressure is within the set range, and prevent pressure overshoot caused by system overload or high-pressure plunger pump failure. On the third hand, by setting a high-pressure filter, the cleanliness of the high-pressure oil can be guaranteed, reducing interference with the performance verification results.

[0050] For details, please continue to refer to Figure 2 The oil replenishment unit includes a DC speed regulating motor 1, a proportional piston pump 2, a high pressure filter 9.1, a relief valve 3, and a pressure sensor 7.2. The DC speed regulating motor 1 is directly connected to the proportional piston pump 2 through a coupling, the output end of the proportional piston pump 2 is connected to the relief valve 3 and the high pressure filter 9.1 in sequence, and the pressure sensor 7.2 is connected to the output pipeline of the proportional piston pump 2.

[0051] Furthermore, the DC speed regulating motor 1 is used to drive the proportional piston pump 2. The DC speed regulating motor 1 performs closed-loop speed regulation according to its own speed and the set speed, and adjusts its own speed to the target value based on the received feedback signal to control the operating speed and oil volume of the proportional piston pump 2. The proportional piston pump 2 is used to provide stable low-pressure oil according to the driving speed of the DC speed regulating motor 1. The overflow valve 3 is used to adjust and control the output pressure of the proportional piston pump 2. The pressure sensor 7.2 is used to monitor the outlet pressure of the low-pressure oil output by the proportional piston pump 2, and adjust the outlet pressure of the low-pressure oil based on the relationship between the outlet pressure of the low-pressure oil and the target pressure. The filtration accuracy of the high-pressure filter 9.1 is 5 microns, which is used to filter impurities in the low-pressure oil output by the proportional piston pump 2 to ensure that the low-pressure oil entering the verification module is clean.

[0052] In specific implementation, the DC speed regulating motor 1 starts and drives the proportional piston pump 2 to operate. The speed of the DC speed regulating motor 1 can be adjusted to control the flow output of the proportional piston pump 2. The proportional piston pump 2 outputs low-pressure oil after sucking hydraulic oil from the hydraulic oil tank. The low-pressure oil passes through the relief valve 3, and the relief valve 3 adjusts the flow of the low-pressure oil according to the set pressure value, releases excess pressure, and prevents the system from over-pressure. Further, the low-pressure oil passes through the high-pressure filter 9.1, and the high-pressure filter 9.1 removes impurities in the low-pressure oil to ensure the cleanliness of the low-pressure oil. The pressure sensor 7.2 monitors the pressure of the low-pressure oil output by the proportional piston pump 2 in real time, and adjusts the speed of the DC speed regulating motor 1 based on the relationship between the pressure of the low-pressure oil and the target pressure; when the pressure in the oil port of the digital multi-way valve under test is higher than the preset pressure set by the relief valve 3, the remaining high-pressure oil in the digital multi-way valve under test flows back to the oil tank from the relief valve 3.

[0053] The digital multi-way valve test bench provided in this embodiment provides low-pressure oil to the digital multi-way valve under test by setting an oil replenishment unit when the pressure in the oil port of the digital multi-way valve under test is lower than a preset threshold value. On the first hand, it effectively prevents the phenomenon of air absorption and ensures the normal operation and stability of the digital multi-way valve under test. On the second hand, during the performance verification process, the oil replenishment unit can automatically replenish low-pressure oil to the verification module when the pressure in the oil port of the digital multi-way valve under test is lower than a preset threshold value, thereby ensuring the smooth progress of the performance verification, reducing the situation of operation interruption, improving the test efficiency, and improving the test accuracy.

[0054] For details, please continue to refer to Figure 2 On the right side of the oil replenishment unit, a flow meter 8.1, a return oil filter 11.1, a flow meter 8.2, and a return oil filter 11.2 are also arranged. The input end of the return oil filter 11.1 is connected to the output end of the flow meter 8.1, and the input end of the return oil filter 11.2 is connected to the output end of the flow meter 8.2.

[0055] Further, the flow meter 8.1 is used to monitor the oil flow from the oil replenishment unit to the verification module. The return oil filter 11.1 is used to filter the oil from the oil replenishment unit to the verification module. The flow meter 8.2 is used to monitor the oil flow of the return oil on the return oil line. The return oil filter 11.2 is used to filter the oil on the return oil line to ensure that the oil returned to the oil tank is clean and free of impurities.

[0056] The digital multi-way valve test bench provided in this embodiment can effectively monitor and maintain the flow and cleanliness of the oil in the oil supply circuit and the oil return circuit by setting different combinations of flow meters and return oil filters, thereby ensuring the normal operation of the digital multi-way valve test bench, extending the service life of the digital multi-way valve test bench, and improving the accuracy of performance verification.

[0057] Figure 3This is a schematic diagram of the structure of the verification module shown in an exemplary embodiment of the present application. Figure 3 The verification module includes a pressure switching circuit, a loading bridge circuit and a back pressure loading circuit. Multiple oil inlets of the digital multi-way valve under test are connected to the first series connection point, the second series connection point and the third series connection point of the pressure switching circuit. The first parallel connection point of the loading bridge circuit is connected to the first oil inlet of the digital multi-way valve under test. The second parallel connection point of the loading bridge circuit is connected to the second oil inlet of the digital multi-way valve under test. The back pressure loading circuit is connected to the oil inlet of the digital multi-way valve under test.

[0058] Further, the pressure switching circuit determines the oil inlet of the digital multi-way valve 16 under test based on the performance to be verified of the digital multi-way valve 16 under test, and controls the high-pressure oil to flow to the oil inlet, wherein the oil inlet is at least one oil port of the digital multi-way valve 16 under test. The loading bridge applies a load to the digital multi-way valve under test based on the oil inlet of the digital multi-way valve 16 under test, and controls the loading of the digital multi-way valve 16 under test. The back pressure loading circuit is used to apply reverse pressure to the oil inlet of the digital multi-way valve 16 under test during the loading process of the digital multi-way valve 16 under test.

[0059] Specifically, the pressure switching circuit includes multiple electromagnetic stop valves, some of which are used to control the on-off connection between the oil tank, the loading bridge circuit and the oil inlet of the digital multi-way valve 16 under test, and some of which are used to control the on-off connection between the pressure switching circuit and the return oil circuit. All electromagnetic stop valves work together to deliver high-pressure oil to the oil inlet of the digital multi-way valve 16 under test to load the oil inlet.

[0060] Furthermore, the plurality of electromagnetic stop valves form N series circuits, each series circuit includes at least one electromagnetic stop valve, and each series circuit controls an oil inlet.

[0061] For details, please continue to refer to Figure 3, the plurality of electromagnetic stop valves include electromagnetic stop valve 12.1, electromagnetic stop valve 12.2, electromagnetic stop valve 12.3, electromagnetic stop valve 12.4, electromagnetic stop valve 12.5, electromagnetic stop valve 12.6, electromagnetic stop valve 12.7, electromagnetic stop valve 12.8, and electromagnetic stop valve 12.9. Among them, the electromagnetic stop valve 12.1 forms a series circuit 1, the first series connection point is set on the series circuit 1, and the series circuit 1 controls the first oil inlet of the digital multi-way valve under test. The electromagnetic stop valve 12.2, the electromagnetic stop valve 12.3, the electromagnetic stop valve 12.6, and the electromagnetic stop valve 12.8 are connected in series to form a series circuit 2, and the series connection point is the second series connection point. The series circuit 2 controls the second oil inlet of the digital multi-way valve under test. The electromagnetic stop valve 12.4, the electromagnetic stop valve 12.5, the electromagnetic stop valve 12.7 and the electromagnetic stop valve 12.9 are connected in series to form a series circuit 3, whose series connection point is the third series connection point. The series circuit 3 controls the third oil inlet of the digital multi-way valve under test.

[0062] It should be noted that the first series connection point, the second series connection point and the third series connection point are located in different lines and are respectively connected to different oil inlets of the digital multi-way valve under test.

[0063] Furthermore, the electromagnetic stop valve 12.1, the electromagnetic stop valve 12.3, and the electromagnetic stop valve 12.4 are connected in parallel to control the oil inlet of the digital multi-way valve 16 under test. The electromagnetic stop valve 12.2 and the electromagnetic stop valve 12.5 are connected in parallel to control the on-off of the oil inlet of the digital multi-way valve 16 under test and the loading bridge circuit. The electromagnetic stop valve 12.6 and the electromagnetic stop valve 12.7 are connected in parallel to control the on-off of the oil inlet of the digital multi-way valve 16 under test and the oil tank. The electromagnetic stop valve 12.8 and the electromagnetic stop valve 12.9 are connected in parallel to control the on-off of the pressure switching circuit and the oil return circuit.

[0064] It should be noted that the oil inlet of the digital multi-way valve 16 under test is related to the performance to be verified of the digital multi-way valve 16 under test, and the digital multi-way valve 16 under test has multiple oil inlets. Figure 3 The oil inlet of the digital multi-way valve 16 under test includes the first oil inlet P, the second oil inlet A (A1, A2, A3, A4, A5, A6), and the third oil inlet B (B1, B2, B3, B4, B5, B6). Among them, the first oil inlet P represents the oil inlet of the digital multi-way valve 16 under test; the second oil inlet A represents the first working oil port of the digital multi-way valve under test, and the third oil inlet B represents the second working oil port of the digital multi-way valve 16 under test.

[0065] Preferably, in a possible implementation, when the performance of the digital multi-way valve 16 under test is verified, the electromagnetic stop valve 12.1 is controlled to open, the first oil inlet P of the digital multi-way valve 16 under test is opened, and the high-pressure oil flows to the first oil inlet P; the electromagnetic stop valve 12.2 is controlled to be closed and the electromagnetic stop valve 12.3 is controlled to be opened, the second oil inlet A1 of the digital multi-way valve 16 under test is opened, the second oil inlet A1 is disconnected from the loading bridge circuit, and the high-pressure oil flows from the first oil inlet P to the second oil inlet A1; the electromagnetic stop valve 12.4 is controlled to be opened and the electromagnetic stop valve 12.5 is controlled to be closed, the third oil inlet B1 of the digital multi-way valve 16 under test is opened, the third oil inlet B1 is disconnected from the loading bridge circuit, and the high-pressure oil flows from the second oil inlet A1 to the third oil inlet B1.

[0066] Specifically, in combination with the above description, when it is necessary to perform performance verification on the digital multi-way valve 16 under test. At this time, it is necessary to perform performance verification on different oil inlets (P, A1 and B1) of the digital multi-way valve 16 under test respectively. First, open the electromagnetic stop valve 12.1, and the oil inlet P of the digital multi-way valve under test is opened. At this time, high-pressure oil enters the oil inlet P, and the performance verification of the oil inlet P is performed. Further, open the electromagnetic stop valve 12.3, and the oil inlet A1 of the digital multi-way valve under test is opened. At the same time, close the electromagnetic stop valve 12.2 to prevent the high-pressure oil from flowing from the oil inlet A1 to the loading circuit. At this time, the high-pressure oil flows from the oil inlet P to the oil inlet A1, and the performance verification of the oil inlet A1 is performed. Further, open the electromagnetic stop valve 12.4, and the oil inlet B1 of the digital multi-way valve under test is opened. At the same time, close the electromagnetic stop valve 12.5 to prevent the high-pressure oil from flowing from the oil inlet B1 to the loading circuit. At this time, the high-pressure oil flows from the oil inlet A1 to the oil inlet B1 to verify the performance of the oil inlet B1. Based on the performance verification of the oil inlets P1, A1 and B1, the performance parameters of the digital multi-way valve 16 under test are collected by the sensor during the test, and the performance of the digital multi-way valve 16 under test is verified.

[0067] Specifically, the loading bridge includes a plurality of one-way valves and a proportional relief valve. The plurality of one-way valves work together to apply a load to the oil inlet of the digital multi-way valve under test based on the flow direction of the high-pressure oil; the proportional relief valve adjusts the pressure flowing into the oil inlet of the digital multi-way valve under test.

[0068] For details, please continue to refer to Figure 3The multiple one-way valves include one-way valve 13.1, one-way valve 13.2, one-way valve 13.3, and one-way valve 13.4. Among them, the one-way valve 13.1 and the one-way valve 13.2 are connected in parallel, and their parallel connection point is the first parallel connection point of the loading bridge circuit, which is connected to the oil inlet A1 of the digital multi-way valve under test; the one-way valve 13.3 and the one-way valve 13.4 are connected in parallel, and their parallel connection point is the second parallel connection point of the loading bridge circuit, which is connected to the oil inlet B1 of the digital multi-way valve under test; the proportional relief valve 4.2 is located between the one-way valve 13.1 and the one-way valve 13.3.

[0069] It should be noted that the first parallel connection point and the second parallel connection point are respectively located in different lines and connected to different oil inlets of the digital multi-way valve under test.

[0070] Furthermore, the one-way valve 13.1 and the one-way valve 13.2 are used to control the high-pressure oil to flow into the first oil inlet A1 of the digital multi-way valve 16 under test when a positive load is applied to the digital multi-way valve 16 under test. The one-way valve 13.3 and the one-way valve 13.4 are used to control the high-pressure oil to flow into the second oil inlet B1 of the digital multi-way valve 16 under test when a reverse load is applied to the digital multi-way valve 16 under test. The proportional relief valve 4.2 is used to adjust the applied load pressure to meet the test requirements under different working conditions.

[0071] In a specific implementation, in a possible implementation, when a positive load is applied to the oil inlet of the digital multi-way valve 16 under test based on the flow direction of the high-pressure oil, the one-way valve 13.1 and the one-way valve 13.2 are opened, and the one-way valve 13.3 and the one-way valve 13.4 are closed. The high-pressure oil flows into the first oil inlet A1 of the digital multi-way valve 16 under test through the one-way valve 13.1 and the one-way valve 13.2, and the proportional relief valve 4.2 adjusts the pressure flowing into the first oil inlet A1 of the digital multi-way valve 16 under test to apply the required positive load.

[0072] In another possible implementation, when a reverse load is applied to the oil inlet of the digital multi-way valve 16 under test based on the flow direction of the high-pressure oil, the one-way valves 13.1 and 13.2 are closed, and the one-way valves 13.3 and 13.4 are opened. The high-pressure oil flows into the second oil inlet B1 of the digital multi-way valve 16 under test through the one-way valves 13.3 and 13.4, and the proportional relief valve 4.2 adjusts the pressure flowing into the second oil inlet B1 of the digital multi-way valve 16 under test to apply the required reverse load.

[0073] For details, please continue to refer to Figure 3 The back pressure loading circuit includes an electromagnetic stop valve 12.10 and an electromagnetic overflow valve 14. The input end of the electromagnetic stop valve 12.10 is connected to the output pipeline of the electromagnetic overflow valve 14, the output end of the electromagnetic stop valve 12.10 is connected to the oil inlet of the digital multi-way valve 16 to be tested, and the input end of the electromagnetic overflow valve 14 is connected to the drive module.

[0074] Furthermore, the electromagnetic stop valve 12.10 is used to control the on-off of the back pressure loading circuit, so that the back pressure loading can be performed according to the to-be-verified performance of the tested digital multi-way valve 16. The electromagnetic overflow valve 14 is used to adjust and control the back pressure.

[0075] In specific implementation, the back pressure value of the electromagnetic overflow valve 14 is set according to the performance to be verified of the digital multi-way valve 16 to be tested. Further, the electromagnetic stop valve 12.10 is opened, the back pressure loading circuit is connected, and the electromagnetic overflow valve 14 starts to adjust the back pressure, and the set back pressure value is loaded to the oil inlet of the digital multi-way valve 16 to be tested.

[0076] The digital multi-way valve test bench provided in this embodiment is provided with a back pressure loading circuit consisting of an electromagnetic stop valve and an electromagnetic overflow valve. On the one hand, it ensures that the back pressure can be flexibly changed under different test conditions, and can be flexibly started and stopped according to the test steps to meet different test requirements and improve the accuracy and controllability of the test. On the other hand, through back pressure loading, the reverse pressure of the digital multi-way valve under actual working conditions can be simulated to test the performance and pressure resistance of the digital multi-way valve under test in different pressure environments. It is helpful to check the sealing, response speed and durability of the digital multi-way valve under test, and ensure its reliability under real working conditions.

[0077] The digital multi-way valve test bench provided in this embodiment is provided with a proportional relief valve. On the one hand, the proportional relief valve can accurately adjust the pressure flowing into the oil inlet of the digital multi-way valve under test according to the set value, so as to achieve high-precision pressure control and ensure that the load pressure applied to the digital multi-way valve under test is accurate. On the other hand, by flexibly adjusting the pressure, the working conditions of the digital multi-way valve under test under different pressure conditions, such as normal operation, pressure shock and system vibration, can be simulated. On the third hand, the proportional relief valve monitors the system pressure based on the set maximum pressure value. When the set value is exceeded, the proportional relief valve releases the excess oil into the oil return line or the oil tank to prevent the system from being damaged due to excessive pressure and to ensure the safety of the test equipment and personnel.

[0078] The digital multi-way valve test bench provided in this embodiment, on the one hand, uses a DC speed regulating motor as a driving device, which can realize closed-loop speed control, improve the accuracy of the high-pressure oil output by the tested motor, and can test the optimal speed range of the tested motor, thereby improving the accuracy and reliability of the control performance verification of the tested motor. On the other hand, by setting the digital multi-way valve test bench as a driving module and a verification module, the tested digital multi-way valve is installed on the verification module, and the driving module provides high-pressure oil to the verification module. The verification module applies a load to the tested digital multi-way valve based on the performance to be verified of the tested digital multi-way valve to control the loading of the tested digital multi-way valve, and the working load of the tested digital multi-way valve can be accurately adjusted, thereby controlling the output pressure and flow of the tested digital multi-way valve, avoiding idling or overspeeding of the tested digital multi-way valve, and improving stability. In addition, based on the sensors installed on the digital multi-way valve under test, the performance parameters of the digital multi-way valve under test during the loading process are collected in real time. Subsequently, the performance of the digital multi-way valve under test can be verified based on the performance parameters corresponding to the performance to be verified and the performance verification method, thereby realizing the verification of the key control performance of the digital multi-way valve, and realizing new functions such as multi-source state detection and life prediction of the digital multi-way valve, providing test conditions for the factory test and research and development of new digital multi-way valves. Thirdly, the oil inlet of the digital multi-way valve under test is determined based on the performance to be verified of the digital multi-way valve under test, and then different loads are applied to the digital multi-way valve under test based on different oil inlets, so as to simulate various working conditions of the digital multi-way valve in actual applications, comprehensively verify the performance of the digital multi-way valve under various working conditions, improve the accuracy and reliability of performance verification, and realize refined performance analysis and fault diagnosis. Fourthly, by integrating the loops of various performance tests into one loop, the working conditions can be quickly adjusted according to different performance verification requirements by simply changing the oil inlet of the digital multi-way valve under test, reducing the need for additional test equipment, and without switching the pipeline interface. It has high flexibility and is easy to operate, which helps save resources and reduce test costs, and improves test efficiency. Fifthly, by setting an oil replenishment unit, when the pressure in the oil port of the digital multi-way valve under test is lower than the preset threshold, low-pressure oil is provided to the digital multi-way valve under test, effectively preventing the phenomenon of air suction and ensuring the normal operation and stability of the digital multi-way valve under test. Moreover, during the performance verification process, the oil replenishment unit can automatically replenish low-pressure oil to the verification module when the pressure in the oil port of the digital multi-way valve under test is lower than the preset threshold, ensuring the smooth progress of performance verification, reducing the situation of operation interruption, improving test efficiency, and improving test accuracy.

[0079] Corresponding to the aforementioned embodiment of a digital multi-way valve test bench, the present application also provides an embodiment of a digital multi-way valve performance verification method.

[0080] Figure 4 This is a flow chart of the first embodiment of the digital multi-way valve performance verification method provided by this application. Please refer to Figure 4 , the method provided in this embodiment is applied to the digital multi-way valve test bench described in any one of the present applications; the method comprises:

[0081] S401. Determine an oil inlet of the digital multi-way valve under test based on the performance to be verified of the digital multi-way valve under test, and control high-pressure oil to flow to the oil inlet.

[0082] Specifically, the oil inlet of the digital multi-way valve under test is related to the performance to be verified of the digital multi-way valve under test. In combination with the above description, the performance to be verified of the digital multi-way valve under test can correspond to multiple oil inlets. For example, when the performance to be verified is pressure resistance, the oil inlets of the digital multi-way valve under test include port P, port A1, and port B1.

[0083] S402: Apply a load to the oil inlet of the digital multi-way valve under test based on the flow direction of the high-pressure oil, and control the loading of the digital multi-way valve under test.

[0084] Specifically, the direction of the load applied to the oil inlet of the digital multi-way valve under test is consistent with the flow direction of the high-pressure oil.

[0085] In this step, based on the flow direction of the high-pressure oil, a load in the same direction is applied to the oil inlet of the digital multi-way valve under test, and the digital multi-way valve under test is loaded under the drive of the high-pressure oil.

[0086] S403 . Collecting performance parameters of the digital multi-way valve under test during the loading process based on sensors, and performing performance verification on the digital multi-way valve under test based on the performance parameters.

[0087] Specifically, the performance parameters collected by the sensor are related to the performance to be verified of the digital multi-way valve under test, that is, corresponding performance parameters are collected based on different types of sensors, wherein the types of sensors include at least vibration sensors, temperature sensors, pressure sensors, displacement sensors, and force sensors.

[0088] In specific implementation, based on the performance to be verified of the digital multi-way valve under test, the performance parameters and corresponding sensors to be collected are determined. Based on the various sensors installed on the digital multi-way valve under test, the performance parameters of the digital multi-way valve under test during the loading process are collected in real time. Based on the performance verification method corresponding to the performance to be verified and the collected performance parameters, the performance of the digital multi-way valve under test is verified.

[0089] The method of this embodiment can be used to execute Figure 1 The steps, specific implementation principles and implementation processes of the device embodiment shown are similar and will not be repeated here.

[0090] The implementation process of the functions and effects of each unit in the above-mentioned device is specifically described in the implementation process of the corresponding steps in the above-mentioned method, and will not be repeated here.

[0091] For the device embodiment, since it basically corresponds to the method embodiment, the relevant parts can refer to the partial description of the method embodiment. The device embodiment described above is only schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present application scheme. A person of ordinary skill in the art can understand and implement it without paying any creative work.

[0092] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A digital multi-way valve test bench, characterized in that: The digital multi-way valve test bench includes a driving module and a verification module; wherein the driving module includes a DC speed regulating motor, which is used to provide high-pressure oil to the verification module when the performance of the digital multi-way valve under test is verified; the digital multi-way valve under test is installed on the verification module, and an oil inlet is provided on the digital multi-way valve under test, and the oil inlet is connected to the verification module, and a plurality of sensors are installed on the digital multi-way valve under test, and the type of the sensor is determined according to the type of the digital multi-way valve under test and the performance to be verified, and the sensor is used to collect the performance parameters of the digital multi-way valve under test during the loading process, wherein the performance parameters are used to perform performance verification on the digital multi-way valve under test; The oil inlet of the digital multi-way valve under test is connected to a verification module, which includes a pressure switching circuit, a loading bridge circuit and a back pressure loading circuit. The plurality of oil inlets are connected to a first series connection point, a second series connection point and a third series connection point of the pressure switching circuit. The first parallel connection point of the loading bridge circuit is connected to the first oil inlet of the digital multi-way valve under test, the second parallel connection point of the loading bridge circuit is connected to the second oil inlet of the digital multi-way valve under test, and the back pressure loading circuit is connected to the oil inlet of the digital multi-way valve under test. The verification module is used to determine the oil inlet of the digital multi-way valve under test based on the performance to be verified of the digital multi-way valve under test, control the high-pressure oil to flow to the oil inlet, apply a load to the digital multi-way valve under test, and control the loading of the digital multi-way valve under test; The pressure switching circuit includes a plurality of electromagnetic stop valves, some of which are used to control the on-off between the oil tank, the loading bridge and the oil inlet of the digital multi-way valve under test, and some of which are used to control the on-off between the pressure switching circuit and the oil return circuit, and all of the electromagnetic stop valves work together to deliver high-pressure oil to the oil inlet of the digital multi-way valve under test to load the oil inlet; the plurality of electromagnetic stop valves form N series circuits, each of which includes at least one electromagnetic stop valve, and each series circuit controls one oil inlet; When the performance of the digital multi-way valve under test is verified, the first electromagnetic stop valve is controlled to open, the first oil inlet of the digital multi-way valve under test is opened, and the high-pressure oil flows to the first oil inlet; the second electromagnetic stop valve is controlled to close and the third electromagnetic stop valve is controlled to open, the second oil inlet of the digital multi-way valve under test is opened, and the second oil inlet is disconnected from the loading bridge circuit; the high-pressure oil flows from the first oil inlet to the second oil inlet; wherein, the second oil inlet is the first working oil port of the digital multi-way valve under test; The fourth electromagnetic stop valve is controlled to open and the fifth electromagnetic stop valve is controlled to close, the third oil inlet of the digital multi-way valve under test is opened, and the third oil inlet is disconnected from the loading bridge circuit; the high-pressure oil flows from the second oil inlet to the third oil inlet; wherein, the third oil inlet is the second working oil port of the digital multi-way valve under test.

2. The digital multi-way valve test bench according to claim 1 is characterized in that: The pressure switching circuit determines the oil inlet of the digital multi-way valve under test based on the to-be-verified performance of the digital multi-way valve under test, and controls the high-pressure oil to flow to the oil inlet; The loading bridge applies a load to the digital multi-way valve under test based on the oil inlet of the digital multi-way valve under test, and controls the loading of the digital multi-way valve under test; The back pressure loading circuit is used to apply reverse pressure to the oil inlet of the digital multi-way valve under test during the loading process of the digital multi-way valve under test.

3. The digital multi-way valve test bench according to claim 2 is characterized in that: The loading bridge circuit includes a plurality of one-way valves and a proportional relief valve; wherein the plurality of one-way valves work together to apply a load to the oil inlet of the digital multi-way valve under test based on the flow direction of the high-pressure oil; The proportional relief valve adjusts the pressure flowing into the oil inlet.

4. The digital multi-way valve test bench according to claim 3 is characterized in that: When a positive load is applied to the oil inlet of the digital multi-way valve under test based on the flow direction of the high-pressure oil, the high-pressure oil flows into the first oil inlet of the digital multi-way valve under test through the first one-way valve and the second one-way valve, and the proportional relief valve adjusts the pressure flowing into the first oil inlet to apply the required positive load; When a reverse load is applied to the oil inlet of the digital multi-way valve under test based on the flow direction of the high-pressure oil, the high-pressure oil flows into the second oil inlet of the digital multi-way valve under test through the third one-way valve and the fourth one-way valve, and the proportional relief valve adjusts the pressure flowing into the second oil inlet to apply the required reverse load.

5. The digital multi-way valve test bench according to claim 1 is characterized in that: The driving module includes a power unit and an oil replenishing unit; wherein the power unit is connected to the verification module, and the oil replenishing unit is connected to the verification module; The power unit is used to provide high-pressure oil to the verification module when verifying the performance of the digital multi-way valve under test; The oil replenishing unit is used to provide low-pressure oil to the verification module when the pressure in the oil port of the digital multi-way valve under test is lower than a preset threshold.

6. The digital multi-way valve test bench according to claim 5 is characterized in that: The oil replenishment unit includes a DC speed regulating motor, a proportional plunger pump, a high-pressure filter, a relief valve and a pressure sensor; wherein the DC speed regulating motor is connected to the proportional plunger pump, the output end of the proportional plunger pump is connected to the relief valve and the high-pressure filter in sequence, and the pressure sensor is connected to the output pipeline of the proportional plunger pump; The DC speed regulating motor is used to drive the proportional plunger pump, and the operating speed and oil volume of the proportional plunger pump are controlled by adjusting the speed; The proportional plunger pump is used to provide stable low-pressure oil according to the driving speed of the DC speed regulating motor; The relief valve is used to adjust and control the output pressure of the proportional plunger pump; The pressure sensor is used to monitor the outlet pressure of the low-pressure oil output by the proportional plunger pump, and adjust the outlet pressure of the low-pressure oil based on the relationship between the outlet pressure of the low-pressure oil and the target pressure; The high-pressure filter is used to filter impurities in the low-pressure oil output by the proportional plunger pump to ensure that the low-pressure oil entering the verification module is clean.

7. A digital multi-way valve performance verification method, characterized in that: The digital multi-way valve performance verification method is applied to the digital multi-way valve test bench according to any one of claims 1 to 6; the method comprises: Determine the oil inlet of the digital multi-way valve under test based on the performance to be verified of the digital multi-way valve under test, and control the high-pressure oil to flow to the oil inlet; Applying a load to the oil inlet of the digital multi-way valve under test based on the flow direction of the high-pressure oil, and controlling the loading of the digital multi-way valve under test; The performance parameters of the digital multi-way valve under test during the loading process are collected based on sensors, and the performance of the digital multi-way valve under test is verified based on the performance parameters.

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